# -*- coding: utf-8 -*-

# Define here the models for your spider middleware
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html

from scrapy import signals
import random

class MastergoodreadSpiderMiddleware(object):
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the spider middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_spider_input(self, response, spider):
        # Called for each response that goes through the spider
        # middleware and into the spider.

        # Should return None or raise an exception.
        return None

    def process_spider_output(self, response, result, spider):
        # Called with the results returned from the Spider, after
        # it has processed the response.

        # Must return an iterable of Request, dict or Item objects.
        for i in result:
            yield i

    def process_spider_exception(self, response, exception, spider):
        # Called when a spider or process_spider_input() method
        # (from other spider middleware) raises an exception.

        # Should return either None or an iterable of Response, dict
        # or Item objects.
        pass

    def process_start_requests(self, start_requests, spider):
        # Called with the start requests of the spider, and works
        # similarly to the process_spider_output() method, except
        # that it doesn’t have a response associated.

        # Must return only requests (not items).
        for r in start_requests:
            yield r

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)


class MastergoodreadDownloaderMiddleware(object):
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the downloader middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_request(self, request, spider):
        # Called for each request that goes through the downloader
        # middleware.

        # Must either:
        # - return None: continue processing this request
        # - or return a Response object
        # - or return a Request object
        # - or raise IgnoreRequest: process_exception() methods of
        #   installed downloader middleware will be called
        return None

    def process_response(self, request, response, spider):
        # Called with the response returned from the downloader.

        # Must either;
        # - return a Response object
        # - return a Request object
        # - or raise IgnoreRequest
        return response

    def process_exception(self, request, exception, spider):
        # Called when a download handler or a process_request()
        # (from other downloader middleware) raises an exception.

        # Must either:
        # - return None: continue processing this exception
        # - return a Response object: stops process_exception() chain
        # - return a Request object: stops process_exception() chain
        pass

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)

class HttpbinProxyMiddleware(object):
    def process_request(self, request, spider):
        proxy_list = [
        '37.32.127.183:52519',
        '46.209.30.157:8080',
        '91.98.101.44:59052',
        '217.146.209.25:8080',
        '178.239.147.131:56133',
        '5.160.14.130:54039',
        '82.99.221.18:53281',
        '185.112.36.215:37524',
        '37.32.127.161:39934',
        '93.126.28.112:8080',
        '185.129.212.8:8080',
        '2.179.67.8:8080',
        '217.146.209.15:8080',
        '94.183.175.66:23500',
        '83.147.220.217:53281',
        '79.174.166.39:51096',
        '5.202.145.31:53281',
        '77.237.90.251:8080',
        '46.225.234.114:23500',
        '46.209.58.189:32231',
        '185.66.224.83:80',
        '5.160.14.130:54039',
        '188.75.82.101:40387',
        '46.100.58.6:8080',
        '92.50.31.125:30455',
        '89.221.85.98:8888',
        '5.202.176.18:30641',
        '2.188.171.80:8888',
        '82.99.228.153:8080',
        '78.38.180.21:8080',
        '5.202.114.4:39597',
        '84.241.15.23:23500',
        '185.112.35.28:52478',
        '93.118.102.82:8080',
        '84.241.24.67:23500',
        '93.126.28.112:8080',
        '46.245.38.239:58610',
        '2.188.25.133:8080',
        '94.74.134.186:80',
        '185.129.212.25:50505',
        ]
        request.meta['proxy'] = 'http://' + random.choice(proxy_list)
